Unlock the Power of UIView Frame Animation Get Ready for an EyePopping Transformation

One of the coolest things about iOS apps is how animated they are. Views can nimbly fly across the screen, gracefully fade in and out, cleverly rotate around and rescale, and much, much more! UIView animation is everywhere in iOS, and it’s a big part of what makes iOS apps so much fun.

Thoughtfully chosen animations look great, and they can really bring your own iOS app to life. Better still, they’re also a great way to draw a user’s attention any time new or additional information becomes available in your app.

But maybe the best part about UIView animation is that it’s incredibly easy to implement. All it takes is a few lines of code, and you’re up and running!

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In this tutorial, you’ll get a chance to go hands-on with UIView animation! You’ll create a simple app with a picnic theme: You’ll use animation to open the picnic basket, animate an interloping bug that’s snuck into the basket, then take decisive action, so your tasty picnic goodies stay bug-free!

As you’re doing this, you’ll learn to use the basic UIView animation APIs and to chain animations together for even more satisfying effects.

To help you appreciate how nice and easy native UIView animation is, first review some of the steps you’d need to take if iOS didn’t provide built-in animation tools and you wanted to animate a view moving across the screen on your own:

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That’s all possible to do, but you’d likely think hard before implementing even a simple animation this way. And homegrown animations like this would get more complex as you added animations of different types, durations, and delays. Your code would become more complicated still as animations interacted. You’d end up micro-managing animation implementation details rather than working on meaningful code.

(scale, rotation, etc.), have built-in animation support. And best of all, instead of having to sweat all the frame-by-frame steps listed, using UIView animation, all you do is:

Once you’ve completed these 2 simple steps, UIView animation will manage all the fine details and complexities to deliver silky smooth animations on your behalf. Time to dive right in and see how to make this magic happen in code!

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Button at the top or bottom of this tutorial to download the starter project. Unzip the downloaded project, open the starter project, and take a look around: You’ll see that the starter project contains a view controller and a main storyboard pre-populated with the elements you’ll need. The outlets for each elements are already connected, so you can get right to work on the good stuff. You might also notice a sound file, which you’ll use for some extra fun at the end of this tutorial!

, you’ll see the views you’ll be animating: The doors of your fancy picnic basket, a spiffy set of fabric napkins, a plate of tasty cheese, and a sneaky, picnic-crashing bug.

. The basket views have constraints anchoring them to their parent view, while the fabric views are directly positioned. If you’d like to learn more about how to use

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Next, you’ll flesh out these methods, starting with the napkins. You’ll start here because it’s a bit simpler to animate views without constraints.

Sweet! Now when your app launches, the napkins animate to reveal the yummy picnic goodies in your basket (well, that plus an unwanted buggy… for now).

A subscription is the best way to learn and master mobile development. Learn iOS, Swift, Android, Kotlin, Flutter and Dart development and unlock our massive catalog of 50+ books and 4, 000+ videos.

Power Up Your Animations! 💫

Button at the top or bottom of this tutorial to download the starter project. Unzip the downloaded project, open the starter project, and take a look around: You’ll see that the starter project contains a view controller and a main storyboard pre-populated with the elements you’ll need. The outlets for each elements are already connected, so you can get right to work on the good stuff. You might also notice a sound file, which you’ll use for some extra fun at the end of this tutorial!

, you’ll see the views you’ll be animating: The doors of your fancy picnic basket, a spiffy set of fabric napkins, a plate of tasty cheese, and a sneaky, picnic-crashing bug.

. The basket views have constraints anchoring them to their parent view, while the fabric views are directly positioned. If you’d like to learn more about how to use

Animations & Swift

Next, you’ll flesh out these methods, starting with the napkins. You’ll start here because it’s a bit simpler to animate views without constraints.

Sweet! Now when your app launches, the napkins animate to reveal the yummy picnic goodies in your basket (well, that plus an unwanted buggy… for now).

A subscription is the best way to learn and master mobile development. Learn iOS, Swift, Android, Kotlin, Flutter and Dart development and unlock our massive catalog of 50+ books and 4, 000+ videos.

Power Up Your Animations! 💫

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